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7. Next, focus the scope by turning the focus ring on the
sight’s ring. You may have to re-focus both lenses to
achieve sharp focus.
NOTE: For best result, use a 50mm lens. Wide angle and/or
zoom lenses typically cannot provide a full-screen image
through the DN-200 unit. Camera lens aperture setting
lower (wider) than f2.0 may result in lower image
resolution.
FILM: Use a ISO 400 film or faster. Also, using a tripod is
strongly recommended due to the low shutter speeds
common in night vision photography. The following table
shows approximate shutter speeds at various ISO values
with the aperture set at f1.8.
ISO 50 100 200 400 800 1600 3200
Shutter Speed, s 1 1/2 1/4 1/8 1/15 1/30 1/60
7. b) Using DN-140 As a Rifle Scope
1. Attach the scope to the rifle using weaver weapon mount
(8). The scope is supplied with a standard 7/8” weaver
mount (or optional European Mount).
2. Turn On the scope (make sure the lens cover is on if it is
daylight).
3. Unscrew the windage/elevation covers (9).
4. Adjust the reticle by screwing the windage/elevation
screws (up-down), (left-right). Each horizontal click is
21mm/100m (3/4“ @ 100 yards); vertical click is
12mm/100m (3/8” @ 100 yards).
5. Screw the windage/elevation covers back on when done.
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starlight or man-made light. The scope was designed to be
easy to use, and provide many years of operation.
Some of the typical activities where the DN-140
Night Vision Rifle Scope will be useful:
• law enforcement
• hunting
• search and rescue
• wildlife observation
• nighttime photography and video
• security
• boating
Features
• Water resistant;
• The DN-140 Rifle Scope is camera/video adaptable;
• The DN-140 comes with precision windage/elevation
adjustments.
• A self-contained Infra Red illuminator is included. It
allows observations in total darkness (i.e basement or
cave);
• Long range of vision;
• Automatic brightness protection
• Soft rubberized eye piece makes the viewing more
comfortable;
• Standard and commonly available 2AA batteries ensure
nonstop operation of the device for no less than 50 hours.
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